An electronic device may have a display with an array of pixels configured to display images for a user. The electronic device may have an ambient light sensor for gathering ambient light information. A set of the pixels may overlap the ambient light sensor so that ambient light measurements may be made on ambient light passing through the set of pixels. Control circuitry in the electronic device may control light transmission through the set of pixels so that different light transmission levels can be used in different ambient light conditions. Directional light measurements may be made by moving transparent pixels dynamically across the surface of the display overlapping the light sensor and/or by using pixelated light modulators to vary the angle of light rays measured by the ambient light sensor.

Particular embodiments described herein provide for an electronic device that includes a display, a backlight for the display, and one or more ambient light guiding layers to supplement the backlight with ambient light. In an example, one of the one or more ambient light guiding layers is located on a back side of the electronic device. An ambient light guide monitoring engine can monitor an intensity of ambient light and a display engine can use data from the ambient light monitoring engine to determine the intensity of the backlight for the display.

The present disclosure provides a display device which includes a liquid crystal display panel and a backlight assembly. The backlight assembly includes a light diffusion component and a light emitting component optically coupled to the light diffusion component. The display device further includes a light guide component configured to direct ambient light to the light diffusion component.

A vehicular display device includes: a display board for displaying a scale; a liquid crystal display panel including an image display surface for displaying an image, and having an overlapping region in which the image display surface overlaps the display board further rearward than the display board; a light source for illuminating the liquid crystal display panel; and a first light guide body for receiving light from the light source via the liquid crystal display panel and emitting the light. The first light guide body includes: a light receiving part disposed between the overlapping region of the image display surface and the display board, for receiving the light from the light source via the liquid crystal display panel; and a light-emitting part exposed outwardly from the display board as viewed by a viewer, for emitting light from the first light guide body that is received by the light-receiving part.

A display panel, a method for preparing a display panel and a method for adjusting an intensity of ambient light reflected on a display panel are provided in embodiments of the disclosure. The display panel includes: a base substrate; a plurality of sub-pixel units (20) on the base substrate comprising a plurality of light emitting portions respectively; an electrochromic assembly on a light-emergent side of the plurality of light emitting portions; and a light intensity detector configured to detect an incident intensity of ambient light, and the electrochromic assembly comprises a plurality of electrochromic portions covering the plurality of light emitting portions, respectively; and transmittance of the plurality of electrochromic portions for ambient light varies with a change in the incident intensity of ambient light.

An optical structure and a method for controlling the same, and a display device are provided. The optical structure includes a light adjustment component, optical sensing components and a controller. The light adjustment component is divided into at least two sub-regions. The optical sensing components acquire an intensity of ambient light irradiating onto each sub-region of the light adjustment component. The controller controls a light transmittance of the corresponding sub-region based on the intensity of the ambient light irradiating onto the corresponding sub-region.

Display technologies are provided for configuring the direction of content presentation using a single display assembly. In some embodiments, the display assembly includes a transparent display unit intercalated between a first switchable layer and a second switchable layer. Each one of the first switchable layer and the second switchable layer is formed to reversibly transition between a transparent state and an opaque state in response to an applied electric field. The transparent display unit, the first switchable layer, and the second switchable layer can be operated individually to configure a particular direction of presenting digital content. In other embodiments, the display assembly includes a switchable layer intercalated between a first transparent display unit and a second transparent display unit. The switchable layer, the first transparent display unit, and the second transparent display unit can be operated individually to configure a particular direction of presenting digital content.

Display technologies are provided for configuring the direction of content presentation using a single display assembly. In some embodiments, the display assembly includes a transparent display unit intercalated between a first switchable layer and a second switchable layer. Each one of the first switchable layer and the second switchable layer is formed to reversibly transition between a transparent state and an opaque state in response to an applied electric field. The transparent display unit, the first switchable layer, and the second switchable layer can be operated individually to configure a particular direction of presenting digital content. In other embodiments, the display assembly includes a switchable layer intercalated between a first transparent display unit and a second transparent display unit. The switchable layer, the first transparent display unit, and the second transparent display unit can be operated individually to configure a particular direction of presenting digital content.

The disclosure discloses a display panel and a display device. The display panel includes: a base substrate, a reflecting layer, a dielectric grating layer, a filter layer, and a color filter layer including a first color filter element for transmitting light rays in a first color, a second color filter element for transmitting light rays in a second color, and a third color filter element for transmitting white light; the filter layer is configured to transmit light rays in first and second colors, and to reflect light rays in a third color; the dielectric grating layer includes a grating element corresponding in position to the third color filter element, and configured to reflect light rays in the first color transmitted through the filter layer to the first color filter element, and to reflect light rays in the second color transmitted through the filter layer to the second color filter element.

A display assembly and an electronic apparatus are provided. The display assembly includes: a first substrate and a second substrate opposite to each other; a liquid crystal layer between them; a first part including a first light shielding portion, a second light shielding portion and an electrochromic portion; and a second part, including a third light shielding portion, a fourth light shielding portion and a transparent portion, wherein the first part is arranged on a side of the first substrate facing towards the second substrate; wherein the second part is arranged on a side of the second substrate facing towards the first substrate; and wherein a first electrode layer and a second electrode layer are arranged between the first substrate and the second substrate and configured to adjust states of liquid crystal molecules in the liquid crystal layer.